Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Components of (loss) earnings from continuing operations before income taxes [Abstract]
United States		$ (15.4)	$ 31.1	$ 14.1
Foreign		5.5	10.1	9.9
(Loss) earnings from continuing operations before income taxes		(9.9)	41.2	24.0
Federal [Abstract]
Current		0.1	0.4	(2.0)
Deferred		(13.0)	7.1	(95.8)
State [Abstract]
Current		0.2	0.0	0.2
Deferred		(2.5)	1.1	(21.4)
Foreign [Abstract]
Current		9.6	12.7	10.0
Deferred		(3.3)	(2.3)	1.1
Total income tax (benefit) expense		$ (8.9)	$ 19.0	$ (107.9)
Reconciliation of federal statutory income tax rate to company's effective income tax rate [Abstract]
Statutory federal tax		35.00%	35.00%	35.00%
State taxes, net of federal benefit		11.50%	2.40%	2.10%
Taxes on non-U.S. earnings and losses		26.40%	(4.90%)	(3.80%)
Valuation allowance		(20.90%)	8.30%	(471.70%)
Tax credits		20.50%	(6.10%)	(7.10%)
Compensation		(3.70%)	1.00%	0.40%
Tax rate or law changes		1.30%	1.20%	(9.20%)
Uncertain tax positions net of settlements		(4.30%)	2.20%	0.40%
Dividend repatriation		16.00%	2.40%	5.80%
Other		8.10%	4.60%	(1.50%)
Effective tax rate		89.90%	46.10%	(449.60%)
Deferred tax assets [Abstract]
Accounts receivable	$ 0.1	$ 0.1	$ 0.3
Inventories	3.6	3.6	3.8
Plant and equipment	4.3	4.3	0.8
Pension and employee benefits	52.6	52.6	50.5
Net operating loss, capital loss and credit carryforwards	109.4	109.4	105.0
Other, principally accrued liabilities	6.9	6.9	6.8
Total gross deferred tax assets	176.9	176.9	167.2
Less: valuation allowance	(50.8)	(50.8)	(48.0)
Net deferred tax assets	126.1	126.1	119.2
Deferred tax liabilities [Abstract]
Plant and equipment	5.5	5.5	5.3
Goodwill	0.6	0.6	0.6
Other	1.1	1.1	1.0
Total gross deferred tax liabilities	7.2	7.2	6.9
Net deferred tax asset	118.9	118.9	112.3
Valuation Allowance [Line Items]
Reversal of deferred tax asset valuation allowances	3.0	3.0		$ 119.2
Foreign tax benefit from law change				2.2
Reconciliation of unrecognized tax benefits [Roll Forward]
Balance, April 1		5.6	2.1
Gross increases - tax positions in prior period		0.0	3.1
Gross decreases - tax positions in prior period		(0.1)	0.0
Gross increases - tax positions in current period		0.4	0.4
Balance, March 31	5.9	5.9	5.6	2.1
Unrecognized tax benefits that would impact effective tax rate	3.5	3.5
Unrecognized tax benefits accrued interest and penalties	0.0	0.0	0.0
Undistributed foreign earnings [Abstract]
Tax on undistributed earnings of certain joint equity investment	1.1	1.1
Undistributed earnings in remaining foreign operations	491.0	491.0
Foreign Tax Jurisdictions [Member]
Valuation Allowance [Line Items]
Valuation allowance recorded against deferred tax assets		5.0	$ 2.6	$ 12.3
Federal and State [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, research and development	23.3	$ 23.3
Federal and State [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date		Mar. 31, 2018
Federal and State [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date		Mar. 31, 2036
Foreign Tax Jurisdictions [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	330.7	$ 330.7
Tax losses subject to expiration	156.9	156.9
Tax losses not subject to expiration	173.8	$ 173.8
Foreign Tax Jurisdictions [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2017
Foreign Tax Jurisdictions [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2035
State and Local [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	$ 190.8	$ 190.8
State and Local [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2017
State and Local [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2036
Austria [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Fiscal 2012 - 2015
Brazil [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Calendar 2011 - 2015
Germany [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Fiscal 2012 - 2015
United States [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Fiscal 2013 - 2015